Sewing-machine



(No Model.) I 2 S,heets-Sl1eet 1.

R. S. LOCKER.

A SEWING MAGHINE, No. 361,426. Patented Apr. 19, 1887.

II. PETERS, PhbQv-lilhugvapher. Washington. D. C.

(No Model.)

. 2 sneet -she t ,2. R. s. LOOKER.

SEWING MACHINE.

No. 361,426. Patented Apr. 19, 1887.

Win/eases M PETERS, Mme-Limb", Waihhgtnn. D. C.

UNITED STATES PATENT OFFICE.

ROBERT SMITH LOOKEB, OF SPRINGFIELD, OHIO.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 361,426, dated April 19, 1887.

Application filed December ,7, 1883. RenewedJ'uly 30, 1886. Serial No. 209,596. (No model.)

To aZZ whom it may concern.-

. Be it known that I, ROBERT SMITH LOOKER. of Springfield, in the county of Clark and State of Ohio, have invented certain new and useful Improvements in Sewing-Machines, of

which the following is a full, clear, and exactforming the head or frame in two sectionshinged together upon a horizontal and transverse axis, one of said sections being immovable and rigidly connected to the table, and the other section supporting the needle-bar hinged thereto, as described, to swing in a vertical plane in the line of the longitudinal axis of the machine.

' The object of my invention is to remove the needle bar and presser-foot in the head of the arm away from their working position to afford convenient access to the work and to the mechanism both above and beneath the base-plate, and to place the needle in such position and light that it may beeasily threadedand adjusted. I attain these objects by the mechanism illustrated in the accompanying drawings, wherein like letters of reference indicate similar parts in the several views, and in which- Figure 1 is a side elevation of my improved hinged-arm machine. Fig. 2 is aside elevation, partly in section, of my improved ma chine, illustrating the arm raised from its normal position. Fig. 3 illustrates a modified form of the invention in section, illustrating the hinge as situated near the head of the arm.

Fig. 4 is a view similar to Fig. 3, showing the face-plate and a portion of the arm raised from its normal position.

My improvement is applied to any style of machine; but, as illustrated in the acompanying drawings, a machine with abase-plate, A, having a vertical arm, B, secured thereto, a horizontal arm, E, carrying a head and faceplate, E, with the ordinary mechanism contained therein, and presser and needle bars E and E being used, the whole being operated by the ordinary form of band-wheel, O, the shaft of which in this instance is situated slightly below the base-plate A.

In Figs. 1 and 2 a machine isillustrated in which a vertical shaft, I, and a horizontal shaft, H, are used,motion being imparted from one to the other by bevel gear-wheels K and Kon the vertical and horizontal shafts, respectively, said gearing being situated in the hollow portion of the elbow of the'vertical and horizontal arm of the machine. The vertical portion of the arm B has a socket-extension, 0, formed integral with its upper portion, which extends almost entirely around the top of the said vertical arm B. On the end of the horizontal arm E nearest the elbow of the two arms an extension, E, is formed, which is smaller diametrically than the socket C. The extension E is similar in its contour to the socket O, fitting and having free upward movement in the said socket G, the two parts being pivotally connected by the pivot-screws D", situated on each side of the elbow of the machine. These pivotal screws D are secured to the extension E by their screw-threaded portion, the pivot portion thereof extending into small journal-bearings D, cast integral with each side of the socket 0. These two parts 0 and E of the vertical and horizontal portion of the arms are cast hollow, and when pivoted as just described form a hollow elbow in which the gear-wheels K and K on the shafts H and I have free movement without coming in contact with the hinged portions of the arms. The gear-wheels K and K are secured to the end of each of the shafts by suitable means. The shaft H may be locked in any desired position by the thumb-screw G, which engages with the hole It in said shaft, the screwG being seated in the journal-bearings thereof, as illustrated in the drawings, or it maybe seated in a Web cast integral with the inside of the arm E ahead of the journal-bearing. The shaft I is in like manner locked, when desired, by a bolt, J which engages with a hole, i, in the shaft. This bolt J is seated in a suitable position in a web, forming a bearing-journal for the shaft I; or it may be seated in a web cast integral with the inside portion of the arm B, below the journal-bearing. The bolt J is illustrated as a spring-actuated locking bolt; but it can be constructed in the form of a screw-bolt similar to the screw-bolt G and operate with equal efficiency. On the inside of the socket 0, near the point where it joins the arm B proper, a shoulder, b, is formed. On the extension E, near its lowermost inside edge, a corresponding shoulder, e, is formed. These two shoulders engage with each other, and when the head of the arm carrying the face-plate has been lowered, after being removed from its normal position, the needle, as well as the meshing gear, will register accurately with their corresponding engaging parts. In a small boss cast integrel with the socket O in any position a pointed screw-bolt, F, is seated, which engages with the extension E either in suitable holes bored therein or against the out-er surface direct. By this means the arm may be held stationary in any position to which it may be raised.

In Figs. 3 and 4 a modified form of my improvement is illustrated, in which the hinge is placed near the head of the arm, and whereby the said head of the arm and face-plate may be raised from the bed-plate of the machine. The shaft H at this point is divided, the part II carrying the cam-disl and roller for actuating the needle-bar remaining in the head of the arm, and the other portion, H, ofsaid shaft remaining stationary in the undivided portion ofthe arm E, a hinged joint being formed, as at B. The shaft-section H is held in a fixed position in a hearing, I), in the arm E, by a collar, h, and the section is held in bearings If in the head E and prevented from moving longitudinally therein by a clutchhead, It, and the crank-disk K" upon the other side of said hearing if. A clutchhead, 7c, is secured to the end of shaftsection H either by the key i, as shown in Fig. 8, or by a pin passing through the said head and shaft. On the head It" one or more clutclrpins, c, are situated, which engage with holes in the head 70, which pins unite the sections H and H of the divided shaft and cause the two sections to revolve together. A suitable pintle, 1), passes through the hinge-extension B", which hinge is of the ordinary form of construction and may extend the entire width of the arm or only a short distance thereof. A locking device, as k, may be used to secure these two hinged sections together.

The operation of my improved hinged arm is simple and easily understood. The fastening devices are released when either the head and face plate, or the head, face-plate, and entire horizontal arm may be swung upwardly in a vertical plane away from the bed-plate of the machine, and returned when desired. By means of the shaft-fastening devices the parts may be raised from their normal positions and returned thereto without the loss of motion, the said hinged parts registering at the point where the work was temporarily stopped. Asv

heretofore stated, the band fly-wheel O is shown as attached to the end of a horizontal shaft arranged beneath the face-plate; but instead of this construction it is obvious that the horizontal shaft may be extended to the outside of the elbow and the band-wheel attached to it at this point in the well-known manner, the said shaft in this instance being extended outwardly a sufficient distance as to allow the arm-head to be raised the required distance. It is also obvious that the horizontal shaft may be divided at any point. Various mechanical changes can be made and substituted for those shown and described without in the least departing from the nature and principle of my invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a sewing-machine, the overhanging arm L, hinged, substantially as described, to allow the head to be raised up out of its normal position, and means for securing said head in its operative position, substantially as described and shown.

2. In a sewing-machine, the combination of the arm hinged to allow the head to be raised up out of its normal position, and means for securin said head in its raised and its normal position, substantially as described.

3. In a sewing-machine, the combination of an arm supporting the head or guide in which the needle bar and presser foot bar are mounted, said arm hinged to allow the head to be raised up out of its normal position, a needle bar operating shaft passing through the said arm, and-means for securing the head in its raised and in its normal positions.

a. In a sewing-machine, the combination of the arm divided to allow the head to be raised out of its normal position, a connecting-hinge, part of which is situated in each division of the arm, a screw-clamping device for holding the arm in a raised position, a needle-bar-operating shaft in said jointed arm, and means for locking said shaft temporarily against rotation.

5. In a sewing-machine, an arm provided with a head, and with a hinge to permit said head to be turned upward out of its operative position, in combination with a needle-bar mounted in said head, and a divided drivingshaft for the needle-bar, having its two parts mounted, respectively, in the stationary and the hinged portions of the arm, whereby the connection between the shaft and needle-bar may be maintained when the head is lifted.

6. In a sewing-machine, the combination of an arm hinged so as to allow the head to be raised up out of its normal position, a socket formed on the end of the Vertical portion of the arm at the elbow, an extension on the horizontal portion of the arm, said parts engaging and forminga hollow hinged joint, the short pivotal screws connecting the sides of the socketed and extended portions, means for clamping the raised arm in any position situated in the elbow, and suitable screw-bolts for securing the shaft and temporarily suspending its motion, substantially as described.

l'IO

7. In a sewing-machine, the combination of I elbow of the arm of the machine, whereby the IC a vertical arm, B, the socket O on the end I raised arm can be lockedin any position, subthereof, horizontal arm E, having an extenstantially as described. sion, E, engaging with the socket O, pivotal In testimony whereof Ihave hereunto set my screws D connecting the sides of the extended hand this 27 th day of November, A. D. 1883.

and socketed portions, shafts H and I, passing ROBERT SMITH LOOKER. through the jointed arm and concentric there- Witnesses:

with, shaft-locking devices G and J, and all WM. H. ROWE, clamping screw-bolt, as F, situated in the J AMES K. MOOATHRAN. 

